[INFO] updating cached repository bon-chi/pingpong
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/bon-chi/pingpong
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/bon-chi/pingpong" "work/ex/beta-1.38-1/sources/1.37.0/gh/bon-chi/pingpong"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/bon-chi/pingpong'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/bon-chi/pingpong" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bon-chi/pingpong"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bon-chi/pingpong'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 418c6db3ff3408172917d1ba3a913cdcd68265c3
[INFO] sha for GitHub repo bon-chi/pingpong: 418c6db3ff3408172917d1ba3a913cdcd68265c3
[INFO] validating manifest of bon-chi/pingpong on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of bon-chi/pingpong on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing bon-chi/pingpong
[INFO] finished frobbing bon-chi/pingpong
[INFO] frobbed toml for bon-chi/pingpong written to work/ex/beta-1.38-1/sources/1.37.0/gh/bon-chi/pingpong/Cargo.toml
[INFO] started frobbing bon-chi/pingpong
[INFO] finished frobbing bon-chi/pingpong
[INFO] frobbed toml for bon-chi/pingpong written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/bon-chi/pingpong/Cargo.toml
[INFO] crate bon-chi/pingpong already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/bon-chi/pingpong/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing bon-chi/pingpong against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/bon-chi/pingpong:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 475298a7dc88eabfb0979a3a880e662850c8ff09f48fee68c01d1e66e9e9b321
[INFO] running `"docker" "start" "-a" "475298a7dc88eabfb0979a3a880e662850c8ff09f48fee68c01d1e66e9e9b321"`
[INFO] [stderr]    Compiling winapi v0.1.23
[INFO] [stderr]    Compiling mio v0.4.4
[INFO] [stderr]    Compiling pingpong v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0412]: cannot find type `Slab` in this scope
[INFO] [stderr]  --> src/main.rs:9:18
[INFO] [stderr]   |
[INFO] [stderr] 9 |     connections: Slab<Connection>,
[INFO] [stderr]   |                  ^^^^ not found in this scope
[INFO] [stderr] help: possible candidate is found in another module, you can import it into scope
[INFO] [stderr]   |
[INFO] [stderr] 3 | use mio::util::Slab;
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Connection` in this scope
[INFO] [stderr]  --> src/main.rs:9:23
[INFO] [stderr]   |
[INFO] [stderr] 9 |     connections: Slab<Connection>,
[INFO] [stderr]   |                       ^^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0053]: method `ready` has an incompatible type for trait
[INFO] [stderr]   --> src/main.rs:16:5
[INFO] [stderr]    |
[INFO] [stderr] 16 | /     fn ready(&mut self,
[INFO] [stderr] 17 | |              event_loop: &mio::EventLoop<Pong>,
[INFO] [stderr] 18 | |              token: mio::Token,
[INFO] [stderr] 19 | |              events: mio::EventSet) {
[INFO] [stderr] ...  |
[INFO] [stderr] 39 | |         }
[INFO] [stderr] 40 | |     }
[INFO] [stderr]    | |_____^ types differ in mutability
[INFO] [stderr]    |
[INFO] [stderr]    = note: expected type `fn(&mut Pong, &mut mio::EventLoop<Pong>, mio::Token, mio::EventSet)`
[INFO] [stderr]               found type `fn(&mut Pong, &mio::EventLoop<Pong>, mio::Token, mio::EventSet)`
[INFO] [stderr] 
[INFO] [stderr] error[E0063]: missing field `connections` in initializer of `Pong`
[INFO] [stderr]   --> src/main.rs:51:25
[INFO] [stderr]    |
[INFO] [stderr] 51 |     event_loop.run(&mut Pong { server: server });
[INFO] [stderr]    |                         ^^^^ missing `connections`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0053, E0063, E0412.
[INFO] [stderr] For more information about an error, try `rustc --explain E0053`.
[INFO] [stderr] error: Could not compile `pingpong`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "475298a7dc88eabfb0979a3a880e662850c8ff09f48fee68c01d1e66e9e9b321"`
[INFO] running `"docker" "rm" "-f" "475298a7dc88eabfb0979a3a880e662850c8ff09f48fee68c01d1e66e9e9b321"`
[INFO] [stdout] 475298a7dc88eabfb0979a3a880e662850c8ff09f48fee68c01d1e66e9e9b321